package cn.gotom.svg.xml;

import java.io.Serializable;

/**
 * @author 裴绍国
 * @author <a href="mailto:peixere@gmail.com">裴绍国</a>
 */
public class NumberWithUnits implements Serializable
{
	public static final long serialVersionUID = 0;

	public static final int UT_UNITLESS = 0;
	public static final int UT_PX = 1; // Pixels
	public static final int UT_CM = 2; // Centimeters
	public static final int UT_MM = 3; // Millimeters
	public static final int UT_IN = 4; // Inches
	public static final int UT_EM = 5; // Default font height
	public static final int UT_EX = 6; // Height of character 'x' in default font
	public static final int UT_PT = 7; // Points - 1/72 of an inch
	public static final int UT_PC = 8; // Picas - 1/6 of an inch
	public static final int UT_PERCENT = 9; // Percent - relative width

	float value = 0f;
	int unitType = UT_UNITLESS;

	/** Creates a new instance of NumberWithUnits */
	public NumberWithUnits()
	{
	}

	public NumberWithUnits(String value)
	{
		set(value);
	}

	public NumberWithUnits(float value, int unitType)
	{
		this.value = value;
		this.unitType = unitType;
	}

	public float getValue()
	{
		return value;
	}

	public int getUnits()
	{
		return unitType;
	}

	public void set(String value)
	{
		this.value = XMLParseUtil.findFloat(value);
		unitType = UT_UNITLESS;

		if (value.indexOf("px") != -1)
		{
			unitType = UT_PX;
			return;
		}
		if (value.indexOf("cm") != -1)
		{
			unitType = UT_CM;
			return;
		}
		if (value.indexOf("mm") != -1)
		{
			unitType = UT_MM;
			return;
		}
		if (value.indexOf("in") != -1)
		{
			unitType = UT_IN;
			return;
		}
		if (value.indexOf("em") != -1)
		{
			unitType = UT_EM;
			return;
		}
		if (value.indexOf("ex") != -1)
		{
			unitType = UT_EX;
			return;
		}
		if (value.indexOf("pt") != -1)
		{
			unitType = UT_PT;
			return;
		}
		if (value.indexOf("pc") != -1)
		{
			unitType = UT_PC;
			return;
		}
		if (value.indexOf("%") != -1)
		{
			unitType = UT_PERCENT;
			return;
		}
	}

	public static String unitsAsString(int unitIdx)
	{
		switch (unitIdx)
		{
			default:
				return "";
			case UT_PX:
				return "px";
			case UT_CM:
				return "cm";
			case UT_MM:
				return "mm";
			case UT_IN:
				return "in";
			case UT_EM:
				return "em";
			case UT_EX:
				return "ex";
			case UT_PT:
				return "pt";
			case UT_PC:
				return "pc";
			case UT_PERCENT:
				return "%";
		}
	}

	public String toString()
	{
		return "" + value + unitsAsString(unitType);
	}

	public boolean equals(Object obj)
	{
		if (obj == null)
		{
			return false;
		}
		if (getClass() != obj.getClass())
		{
			return false;
		}
		final NumberWithUnits other = (NumberWithUnits) obj;
		if (Float.floatToIntBits(this.value) != Float.floatToIntBits(other.value))
		{
			return false;
		}
		if (this.unitType != other.unitType)
		{
			return false;
		}
		return true;
	}

	public int hashCode()
	{
		int hash = 5;
		hash = 37 * hash + Float.floatToIntBits(this.value);
		hash = 37 * hash + this.unitType;
		return hash;
	}

}
